/*
 * The contents of this web application are subject to the Mozilla Public License Version 
 * 1.1 (the "License"); you may not use this web application except in compliance with 
 * the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/.
 * 
 * Software distributed under the License is distributed on an "AS IS" basis, 
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 * for the specific language governing rights and limitations under the License.
 * 
 * The Original Code is owned by and the Initial Developer of the Original Code is 
 * Composite A/S (Danish business reg.no. 21744409). All Rights Reserved
 * 
 * Section 11 of the License is EXPRESSLY amended to include a provision stating 
 * that any dispute, including but not limited to disputes related to the enforcement 
 * of the License, to which Composite A/S as owner of the Original Code, as Initial 
 * Developer or in any other role, becomes a part to shall be governed by Danish law 
 * and be initiated before the Copenhagen City Court ("K�benhavns Byret")            
 */

using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Web.Hosting;
using Composite.Core.IO;

namespace Composite.Web.Css.Sass
{
    public static class CompressFiles
    {
        private static readonly string SassCompilerFilePath = HostingEnvironment.MapPath("~/Frontend/Composite/Web/Css/Sass/sassc.cmd");

        public static void CompressSass(string sassFilePath, string cssFilePath, DateTime folderLastUpdatedUtc)
        {
            var scriptProc = new Process();
            scriptProc.StartInfo.FileName = "\"" + SassCompilerFilePath + "\"";
            scriptProc.StartInfo.Arguments = sassFilePath;
            scriptProc.StartInfo.WorkingDirectory = Path.GetDirectoryName(sassFilePath);
            scriptProc.StartInfo.RedirectStandardOutput = true;
            scriptProc.StartInfo.RedirectStandardError = true;
            scriptProc.StartInfo.CreateNoWindow = true;
            scriptProc.StartInfo.StandardOutputEncoding = Encoding.UTF8;
            scriptProc.StartInfo.UseShellExecute = false;
            scriptProc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;

            scriptProc.Start();

            string output = scriptProc.StandardOutput.ReadToEnd();
            string error = scriptProc.StandardError.ReadToEnd();

            if (scriptProc.ExitCode == 2)
            {
                throw new CssCompileException(output);
            }

            if (scriptProc.ExitCode != 0)
            {
                throw new InvalidOperationException("Compiling sass caused a scripting host error. " + error);
            }

            C1File.WriteAllText(cssFilePath, output);

            File.SetLastWriteTimeUtc(cssFilePath, folderLastUpdatedUtc);
        }
    }
}
